US755251A - Steam-trap. - Google Patents

Description

No. 755,251. PATENTED MAR. 22, 1904 S. STEINMITZ.

STEAM TRAP.

APPLIUATION FILED D110. 24, 190s.

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UNITED ,STATES Patented March 22, 1904.

PATENT OFFICE.'-

STEAM-TRAP.

SPECIFICATIQN fqrming part of Lettersratent No. 755,251, dated March 22, 1904.

l Application led December 24,1903. Serial No. 186,421. (No model.) i I To a/ZZ whom t may concern:

Be it known that I, SEBASTIAN STEINMITZ, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Traps, of which the following is a specification.

This invention relates to steam-boilers, and particularly to that class thereunder known as traps An object of the invention is to provide novel means for preventing the too rapid return of the valve after the said valve has been unseated in the usual manner-viz. through the buoyancy of a float carrying the valve. In traps where the float rises and falls with the level of the water it is apparent that as the valve unseats when the iioat is lifted a very small degree `the said valve will also be seated when the oat recedes a very small degree. To overcome this tendency of the float to seat the valve with avery small discharge of water. I have provided novel means for retarding the descent of the float, thereby permitting a greater or less period of discharge of the water, according tothe adjustment of the controlling device, another object ofthe invention beingV to provide novel means for effecting the said adjustment.

Furthermore, an object of the invention is to .provide a steam-trap of the character noted in which the retarding means areoutside of the casing, in view and accessible to the operator for the purpose of permitting the adjustment of the parts and for otherwise attending to the renewal or repair of parts.

Finally, an object of the invention is to provide a steam-trap of the character noted which will possess advantages in points of efciency and durability and proving at thesame time comparatively inexpensive to produce and maintain. I

With the foregoing and other objects in view the invention consists in the details of construction and in the arrangement and cornbination of parts to be hereinafter more fully set forth and claimed.

Y In describing the invention in detail reference will be had to the accompanying drawings, forming part of this specification, whereinlike characters denote corresponding parts Yin the several views, and. in which- Figure 1 is a sectional view ofa steam-trap casing with the float and the operative parts thereof in elevation. Fig. 2 is a plan view, and Fig. 3 is a detail view, showing a modified means for holding the dogs.

In the drawings, 1 denotes a casing having suitable legs 2 of any preferred form or construction. The bottom of the casing'is provided with a threaded orifice 3 for the reception of the drain-cock 4.. In the bottom of the casing and approximately centrally thereof is a threaded opening 5 to receive the nipple 6 of the valve-casing 7. The valve-casing has a seat for the valve 8, and the valve 8 is guided in the hollow portion of the nipple by means of the wings 9, three or more of which are provided for the purpose of retaining the valve-stem 10 in alinem'ent with the opening in the nipple. rIhe valve-casing is provided with a drain-opening 11, which may be discharged to any convenient point.

The ioat 12 carries the valvefstem 10in its rise and fall, and with its descent the valve is lseated and with its ascent the valve is unseated.v Water-gages 13 are provided in order to vtest theheight of the water within the chamber.

A pipe 14 is tapped or otherwise connected to the wall of the chamber and is known as the inlet-pipe for the ingress of steam or Water. A vent 15 is provided in the top of the casing, and centrally of the top I provide a stuffing-box 16, having a nipple 17 threaded in the said top. A stern 18 is secured in the top of the oat and extends through the stuifing-boX and terminates at the top in a head 19, larger in diameter than the stem, but being oppositely beveled from its center to thestem and toward the outer end. By reason of Athe tapering walls of the head two lcams 2() vand 21 are produced.

Mounted on the casing is a yoke or standard 22, each side of whichl has a slot 23, in which the dogs 24 are pivoted. The dogs have lintegral arms 25, which extend at right angles to the dogs proper and have screw-threaded surfaces for the reception of the threaded weights 26, which are adjustable on the thread- IOO ed arms to Vary their distance from the pivots 27 of the dogs, the said pivots having bearings in the standard or yoke 22.

rIhe lower ends ofthe dogs are beveled upwardly, as at 28, to engage the camming-surface 21 of the head. At the termination of the beveled surfaces 28 the said dogs have a more abrupt eamming-surface 29, with hoolilike extensions 30 at the junction of the surfaces 28 and 29.

In operation as the condensed steam iiows into the casing of the trap and accumulates to a suiiicient height to lift the Hoat the camming-surface 2l of the head rides over the beveled surface 28 of the dogs and forces the said dogs apart until the head at its largest point passes the hook-like extensions 30 and the said extensions pass under the enlarged portion of the head. The weights tend to force the two dogs together, and as the large portion of the head passes the hook-like extensions 30 the said extensions are pressed into engagement with the camming-surface 20 of the said head, thereby tending to prevent the descent of the oat to a certain degree, the degree depending upon the relation of the weights to the pivots of the dogs.

As has been stated, the float in ordinary devices may return to seat the valve when only a small amount of water has escaped from the trap; but with this invention the dogs sustain a certain amount of the weight of the ioat and said oat is prevented from descending until suicient water has escaped from the casing. It is of course necessary that the adjustment be such that the weight of the fioat will overcome the tendency of the weights A when a predetermined amount of water is passed from the casing and the float lacks support from the interior; but the degree of support required from within is varied, as stated by the adjustment of the weights.

In the modification shown in Fig. 3 I dispense with the weights and also do away with the threaded extensions of the dogs, and in place thereof I utilize springs A, having their ends secured to the yoke or standard, with their ends bearing against the dog to press them normally inwardly. It is my purpose to have the flat portions B of the springs slotted in order that they may be adjusted to engage the dogs near their points or nearer their pivots, according to the pressure required to be exerted to overcome the tendency of the ioat to descend.

If desired, the device for holding the ioat may be placed within the casing.

The construction, operation, and advantages will,it is thought,beunderstood from the foregoing description, it being noted that various changes may be resorted to in the proportions and details of construction for successfully carrying the invention into practice without departing from the scope.

Having fully described the invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a steam-trap, a easing, suitable inlet and outlet openings therein, aiioat in the casing, astem projecting upwardly from the oat, dogs for engaging the stem to retard the descent of the ioat during the recession of the water.

2. In a steam-trap, a casing, suitable inlet and outlet openings therein, a float in the casing, a stem on the iioat projecting upwardly, an enlargement on the stem having a double camming-surface, and dogs engaging the enlarged portion to retard the descent of the ioat during the recession of the water.

3. In a steam-trap, a casing, suitable inlet and outlet openings therein, a float in the casing, a stem projecting upwardly therefrom, an enlargement on the stem having a double camming-surface, dogs for engaging the enlargement to retard the descent of the float during the recession of the water and means for holding the dogs in engagement with the enlargement.

4. In a steam-trap, a casing, suitable inlet and outlet openings therein, aiioat in the casing, a valve carried by Athe iioat, wings for guiding the Valve, a stem projecting upwardly from the float, an enlargement on the stem having a double camming-surface, dogs for engaging the enlargement to retard the descent of the ioat during the recession, of the water.

In testimony whereof I affix my signature in presence of two witnesses.

SEBASTIAN STEINMITZ Witnesses: f

GEORGE EDWARDS, D. B. REPLOGLE.

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